What is the normal serum bicarbonate range?

What is the normal serum bicarbonate range?

• A. 22-26 mEq/L
• B. 18-22 mEq/L
• C. 26-30 mEq/L
• D. 20-24 mEq/L

Answer: (A)

Bicarbonate in the blood acts as a major buffer, helping maintain normal pH. In adults, the commonly cited normal serum bicarbonate level is about 22 to 26 mEq/L. This range reflects proper buffering by the kidneys and respiratory system working together to balance acids and bases. Values below 22 mEq/L suggest metabolic acidosis, while values above 26 mEq/L suggest metabolic alkalosis. Among the options, 22–26 mEq/L is the standard reference range. The other ranges fall outside the typical normal limits.

Bicarbonate in the blood acts as a major buffer, helping maintain normal pH. In adults, the commonly cited normal serum bicarbonate level is about 22 to 26 mEq/L. This range reflects proper buffering by the kidneys and respiratory system working together to balance acids and bases. Values below 22 mEq/L suggest metabolic acidosis, while values above 26 mEq/L suggest metabolic alkalosis. Among the options, 22–26 mEq/L is the standard reference range. The other ranges fall outside the typical normal limits.